newlib/libm/fenv/fesetexceptflag.c

   1 /*
   2   (c) Copyright 2019 Joel Sherrill <joel@rtems.org
   3   All rights reserved.
   4
   5   Redistribution and use in source and binary forms, with or without
   6   modification, are permitted provided that the following conditions
   7   are met:
   8
   9   1. Redistributions of source code must retain the above copyright
  10      notice, this list of conditions and the following disclaimer.
  11
  12   2. Redistributions in binary form must reproduce the above copyright
  13      notice, this list of conditions and the following disclaimer in the
  14      documentation and/or other materials provided with the distribution.
  15
  16   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  17   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  18   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  19   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  20   HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  21   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  22   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  26   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27 */
  28
  29 #include <fenv.h>
  30 #include <errno.h>
  31
  32 /*
  33 FUNCTION
  34 <<fesetexceptflag>>---set floating-point status flags
  35
  36 INDEX
  37         fesetexceptflag
  38
  39 SYNOPSIS
  40         #include <fenv.h>
  41         int fesetexceptflag(const fexcept_t *<[flagp]>, int <[excepts]>);
  42
  43         Link with -lm.
  44
  45 DESCRIPTION
  46 This method attempts to set the floating-point status flags specified
  47 by <[excepts]> to the states indicated by <[flagp]>.  The argument
  48 <[flagp]> must point to an fexcept_t instance obtained via calling
  49 <<fegetexceptflag>> with at least the floating-point exceptions specified
  50 by the argument <[excepts]>.
  51
  52 This method does not raise any floating-point exceptions. It only
  53 sets the state of the flags.
  54
  55 RETURNS
  56 If the information was successfully returned, this method returns
  57 zero. Otherwise, a non-zero value is returned.
  58
  59 PORTABILITY
  60 ANSI C requires <<fesetexceptflag>>.
  61
  62 Not all Newlib targets have a working implementation.  Refer to
  63 the file <<sys/fenv.h>> to see the status for your target.
  64 */
  65
  66 /*
  67  * This is a non-functional implementation that should be overridden
  68  * by an architecture specific implementation in newlib/libm/machine/ARCH.
  69  */
  70 int fesetexceptflag(const fexcept_t *flagp, int excepts)
  71 {
  72   return -ENOTSUP;
  73 }